Kimax® Babcock pipet calibrated to deliver 17.6mL of water, (equivalent to an 18 gram milk sample). Calibrated for no blow-out. A special rubber washer is supplied with each pipet. Grooves on the outer surface of the washer allow air displaced by incoming milk to escape freely. Scale is permanent brown stain. Designed from ASTM Specification E1043, Type II B requirements.